What is the ruling on marrying a girl with the intention of showing kindness to her and seeking reward [from Allah] due to her poverty, illness, or orphanhood, and what is the reward for such an act with Allah?

Marriage is one of the best acts of drawing closer to Allah, as it is a means of chastity, achieving reward through permissible enjoyment, seeking progeny, and increasing the Muslim nation. Furthermore, a Muslim earns reward by spending on his wife, and the reward is increased by showing kindness to the poor or orphaned.